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The NYPD Emerald Society leads pipes and drums from across the country in a first-of-its-kind procession in lower Manhattan

The Friday afternoon procession commemorates the 15th anniversary of the Sept. 11 attacks and all who lost their lives that day and after

Mayor de Blasio and Secretary of Homeland Security Jeh Charles Johnson will speak

An NYPD pipe band lead a march of police officers by the World Trade Center site on Friday afternoon to commemorate the 15th anniversary of the Sept. 11 attacks and to honor the people who lost their lives that day and in the years after.

The NYPD Emerald Society lead pipes and drums from across the country in the procession from Cedar Street and Broadway to the New York City Police Memorial in Battery Park City.

Mayor de Blasio and Secretary of Homeland Security Jeh Charles Johnson spoke on the 63rd floor of One World Trade Center before the procession.

Seventy-two police officers were among the 2,606 killed in the terrorist attacks at the World Trade Center 15 years ago Sunday, according to the National Law Enforcement Officers Memorial Fund. Hundreds more people died in the following months and years.

Police to March in Lower Manhattan in Memory of 9/11 Victims

Police officers will march through lower Manhattan Friday in honor of the people who lost their lives 15 years ago on Sept. 11. Tracie Strahan reports.

(Published Friday, Sept. 9, 2016)

The NYPD created a video series to tell the stories of those lost that day. Watch the videos here.